CN218222368U - Production equipment for reducing salt content and solid waste content of p-methylphenol - Google Patents
Production equipment for reducing salt content and solid waste content of p-methylphenol Download PDFInfo
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- CN218222368U CN218222368U CN202122445290.9U CN202122445290U CN218222368U CN 218222368 U CN218222368 U CN 218222368U CN 202122445290 U CN202122445290 U CN 202122445290U CN 218222368 U CN218222368 U CN 218222368U
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Abstract
The utility model relates to a production facility for reducing salt content and solid waste content of p-methyl phenol belongs to the technical field of chemical industry equipment. Comprises an alkali dissolving kettle, a dipping tank, a flash tank and a washing tank. The alkali dissolving kettle is connected with the impregnation tank; the impregnation tank is connected with the flash tank; the top of the flash tank is connected with the condenser, and the bottom of the flash tank is connected with the centrifuge; the centrifugal machine is connected with the acidification kettle; the acidification kettle is connected with a sulfur dioxide generator; the acidification kettle is connected with the washing tank; the washing tank is connected with the phenol-water separator; the phenol-water separator is connected with the rectifying kettle. The utility model discloses the washing water adopts the original water of system, does not additionally increase water, reduces to methyl phenol solid useless output and salt content.
Description
Technical Field
The utility model relates to a technical field of chemical industry equipment, concretely relates to production facility for reducing p-methyl phenol salt content and solid useless volume.
Background
P-methylphenol is an important fine chemical intermediate, and the main synthesis methods include a toluene sulfonation alkali fusion method, a phenol methylation method, an isopropyl toluene method, a p-toluidine method and the like. The domestic industrial production of p-methylphenol generally adopts a toluene sulfonation alkali fusion method, in the refining process of p-methylphenol, because the p-methylphenol contains a large amount of salt substances such as sodium sulfite and the like, the boiling point of materials is increased in the rectifying process, the content of phenol in residues is high, the yield of phenol residues is large, and in the distillation process, the sodium sulfite is decomposed into acid gases such as sodium sulfate, sodium sulfide, hydrogen sulfide, sulfur dioxide and the like at high temperature, which causes the corrosion of rectifying equipment and the high salt content of the p-methylphenol. At present, the phenol residues are solid wastes, the treatment difficulty is high, the treatment cost is high, and how to reduce the salt content of the p-methylphenol and the generation amount of the solid wastes is a great problem in the p-methylphenol industry.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that exists among the prior art, the utility model provides a production facility for reducing p-methyl phenol salt content and solid useless volume to solve above-mentioned problem.
A production facility for reducing the salt content and the solid waste content of p-methylphenol comprises an alkali dissolving kettle, a dipping tank, a flash tank and a washing tank. The alkali dissolving kettle is connected with the dipping tank; the impregnation tank is connected with the flash tank; the top of the flash tank is connected with the condenser, and the bottom of the flash tank is connected with the centrifuge; the centrifugal machine is connected with the acidification kettle; the acidification kettle is connected with a sulfur dioxide generator; the acidification kettle is connected with the washing tank; the washing tank is connected with the phenol-water separator; the phenol-water separator is connected with the rectifying kettle.
The condenser is connected with the washing tank. The water generated from the flash tank is condensed from the condenser and then changed into distilled water, and the distilled water can be recycled and transferred into a washing tank to wash the crude product of the methyl phenol. After being washed by the condensed water in the washing tank, the salt in the p-methyl phenol can be effectively removed.
Furthermore, the middle part of the acidification kettle is connected with a washing tank. After the p-methylphenol is prepared by acidification with sulfur dioxide, the density of the p-methylphenol is smaller than that of the acid solution, and the solid-liquid separation is carried out by using a standing method, and then the solid on the upper layer can be transferred to a washing tank. This saves on separate equipment.
Further, the temperature in the impregnation tank is 60-105 ℃, and the liquid in the impregnation tank is the liquid separated by the phenol-water separator.
Furthermore, the temperature in the flash tank is 40-60 ℃, and the vacuum degree is-60 to-90 kPa.
Further, the phenol-water separator is a lower discharge centrifuge. The solid separated by the phenol-water separator is directly transferred to a rectifying still from the lower part of the centrifuge for refining treatment.
Further, the phenol-water separator is connected with the impregnation tank. The liquid separated by the phenol-water separator can be returned to the impregnation tank to be used as impregnation liquid for reuse, and the industrial water is effectively saved.
The utility model discloses a theory of operation does: transferring a molten sample generated by an alkali melting kettle into an impregnation tank to be impregnated with water, pumping the impregnated solid-liquid mixture into a flash tank to be subjected to flash evaporation and cooling, condensing and recovering the generated water vapor through a condenser, pumping the cooled solid-liquid mixture into a centrifugal machine to be subjected to solid-liquid separation, feeding the generated liquid into an acidification kettle to be acidified with sulfur dioxide to prepare p-methylphenol, transferring the solid on the upper layer into a washing tank by using a standing method by utilizing the density of the p-methylphenol to be less than that of acid liquor, receiving the water condensed by the condenser by the washing tank, washing and desalting the crude p-methylphenol, and reducing the salt content in the crude product. And transferring the washed p-methylphenol to a rectifying still for refining to obtain the p-methylphenol.
The beneficial effects of the utility model are that:
the utility model discloses a be connected condenser and washing jar, the comdenstion water that can make full use of the flash distillation production is washed the processing to the salinity in the p-methyl phenol crude. After the phenol-water separator is connected with the impregnation tank, the liquid obtained after washing the p-methylphenol crude product can be used as water for the impregnation tank. The utility model discloses the washing water adopts the original water of system, does not additionally increase water, reduces to methyl phenol solid useless output and salt content.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure, 1-an alkali dissolving kettle, 2-an impregnation tank, 3-a flash evaporation tank, 4-a condenser, 5-a centrifuge, 6-an acidification kettle, 7-a sulfur dioxide generator, 8-a washing tank, 9-a phenol-water separator and 10-a rectifying kettle.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Example 1
A production facility for reducing the salt content and the solid waste content of p-methylphenol comprises an alkali dissolving kettle 1, a dipping tank 2, a flash tank 3 and a washing tank 8. The alkali dissolving kettle 1 is connected with the impregnation tank 2; the impregnation tank 2 is connected with a flash tank 3; the top of the flash tank 3 is connected with a condenser 4, and the bottom of the flash tank 3 is connected with a centrifuge 5; the centrifuge 5 is connected with the acidification kettle 6; the acidification kettle 6 is connected with a sulfur dioxide generator 7; the acidification kettle 6 is connected with a washing tank 8; the washing tank 8 is connected with a phenol-water separator 9; the phenol-water separator 9 is respectively connected with the rectifying still 10 and the impregnation tank 2.
Example 2
A production facility for reducing the salt content and the solid waste content of p-methylphenol comprises an alkali dissolving kettle 1, a dipping tank 2, a flash tank 3 and a washing tank 8. The alkali dissolving kettle 1 is connected with the impregnation tank 2; the impregnation tank 2 is connected with a flash tank 3; the temperature in the flash tank 3 is 40-60 ℃, and the vacuum degree is-60 to-90 kPa; the top of the flash tank 3 is connected with a condenser 4, and the bottom of the flash tank 3 is connected with a centrifuge 5; the condenser 4 is connected with a washing tank 8; the centrifuge 5 is connected with the acidification kettle 6; the acidification kettle 6 is connected with a sulfur dioxide generator 7; the middle part of the acidification kettle 6 is connected with a washing tank 8; the washing tank 8 is connected with a phenol-water separator 9; the phenol-water separator 9 is respectively connected with the rectifying still 10 and the impregnation tank 2; the temperature in the impregnation tank 2 is 60-105 ℃, and the liquid in the impregnation tank 2 is the liquid separated by the phenol-water separator 9; the phenol-water separator 9 is a lower discharge centrifuge.
Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. Production equipment for reducing the salt content and the solid waste content of p-methylphenol is characterized by comprising an alkali dissolving kettle, a dipping tank, a flash tank and a washing tank; the alkali dissolving kettle is connected with the dipping tank; the impregnation tank is connected with the flash tank; the top of the flash tank is connected with the condenser, and the bottom of the flash tank is connected with the centrifuge; the centrifugal machine is connected with the acidification kettle; the acidification kettle is connected with a sulfur dioxide generator; the acidification kettle is connected with the washing tank; the washing tank is connected with the phenol-water separator; the phenol-water separator is connected with the rectifying kettle; the condenser is connected with the washing tank.
2. The apparatus for reducing the salt content and solid waste content of p-methylphenol according to claim 1, wherein the middle part of the acidification tank is connected with the washing tank.
3. The production facility for reducing the salt content and the solid waste content of p-methylphenol according to claim 1, wherein the temperature in the impregnation tank is 60-105 ℃.
4. The apparatus for reducing the salt content and solid waste content of p-methylphenol according to claim 1, wherein the liquid in the impregnation tank is the liquid separated by the phenol-water separator.
5. The production facility for reducing the salt content and the solid waste content of p-methylphenol according to claim 1, wherein the phenol-water separator is a bottom discharge centrifuge.
6. The apparatus for reducing the salinity and solid waste of p-methylphenol according to claim 1, wherein the phenol-water separator is connected to the impregnation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122445290.9U CN218222368U (en) | 2021-10-11 | 2021-10-11 | Production equipment for reducing salt content and solid waste content of p-methylphenol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122445290.9U CN218222368U (en) | 2021-10-11 | 2021-10-11 | Production equipment for reducing salt content and solid waste content of p-methylphenol |
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| Publication Number | Publication Date |
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| CN218222368U true CN218222368U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122445290.9U Active CN218222368U (en) | 2021-10-11 | 2021-10-11 | Production equipment for reducing salt content and solid waste content of p-methylphenol |
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| CN (1) | CN218222368U (en) |
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2021
- 2021-10-11 CN CN202122445290.9U patent/CN218222368U/en active Active
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